公开(公告)号：US20220364033A1

公开(公告)日：2022-11-17

申请号：US17767298

申请日：2020-10-09

Applicant: UNIVERSITEIT TWENTE

Inventor： Claas Willem VISSER ,  Vasileios TRIKALITIS ,  Jeroen ROUWKEMA ,  Tom KAMPERMAN

IPC: C12M1/12 ,  A61L27/38 ,  C12N5/00 ,  C12M3/00 ,  A61L27/50

Abstract: The invention provides a construct (1) comprising a number N of material types (100, 110, . . . ), wherein N is at least 2, wherein at least two of the material types (100, 110, . . . ) comprise granular material (101) comprising particles (10), wherein the granular material (101) at least defines an exterior surface (6) of the construct (1), wherein the construct (1) is self-supporting, and wherein the construct (1) is (i) self-healing or is (ii) configured for being self-healing by changing a liquid (15) content of the construct (1); wherein the different material types (100, 110, . . . ) mutually differ in at least one characteristic (19) selected from the group consisting of a physical characteristic and a chemical characteristic.

公开(公告)号：US20230278278A1

公开(公告)日：2023-09-07

申请号：US18315266

申请日：2023-05-10

Applicant: UNIVERSITEIT TWENTE

Inventor： Claas Willem VISSER ,  Dahlia Ningrum AMATO ,  Jennifer A. Lewis ,  Jochen MUELLER

IPC: B29C64/112 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/188 ,  B29C64/245 ,  B29C64/209 ,  B29C64/236 ,  B33Y40/20 ,  B22F10/10 ,  B22F12/30 ,  B22F12/53

CPC classification number: B29C64/112 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/188 ,  B29C64/245 ,  B29C64/209 ,  B29C64/236 ,  B33Y40/20 ,  B22F10/10 ,  B22F12/30 ,  B22F12/53 ,  B29K2105/0002

Abstract: A method of printing a cellular solid by direct bubble writing comprises introducing an ink formulation comprising a polymerizable monomer and a gas into a nozzle, which includes a core flow channel radially surrounded by an outer flow channel. The ink formulation is directed into the outer flow channel and the gas is directed into the core flow channel. The ink formulation and the gas are ejected out of the nozzle as a stream of bubbles, where each bubble includes a core comprising the gas and a liquid shell overlying the core that comprises the ink formulation. After ejection, the polymerizable monomer is polymerized to form a solid polymeric shell from the liquid shell, and the bubbles are deposited on a substrate moving relative to the nozzle. Thus, a polymeric cellular solid having a predetermined geometry is printed.

公开(公告)号：US20210299943A1

公开(公告)日：2021-09-30

申请号：US17265396

申请日：2019-08-02

Applicant: UNIVERSITEIT TWENTE

Inventor： Claas Willem VISSER ,  Dahlia Ningrum AMATO ,  Jennifer A. Lewis ,  Jochen MUELLER

IPC: B29C64/112 ,  B29C64/209 ,  B29C64/236 ,  B29C64/245 ,  B29C64/188 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y70/00

Abstract: A method of printing a cellular solid (120) by direct bubble writing comprises introducing an ink formulation (102) comprising a polymerizable monomer and a gas (104) into a nozzle (106), which includes a core flow channel (108) radially surrounded by an outer flow channel (110). The ink formulation is directed into the outer flow channel (110) and the gas is directed into the core channel (108). The ink formulation (102) and the gas (104) are ejected out of the nozzle (106) as a stream of bubbles (112), where each bubble includes a core (114) comprising the gas and a liquid shell (116) overlying the core that comprises the ink formulation. After ejection, the polymerizable monomer is polymerized to form a solid polymeric shell (118) from the liquid shell (116), and the bubbles are deposited on a substrate (122) moving relative to the nozzle (106). Thus, a polymeric cellular solid (120) having a predetermined geometry is printed.